December Rainfall and Precipitation in The Napa Valley
Average rainfall, rainy days and the driest cities in the Napa Valley, the United States of America in December.
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Best Places to Visit in the Napa Valley in December
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Monthly precipitation
0 mm (0 in) dry → 150 mm (5.9 in) wet
Marker color shows total monthly precipitation in December: pale blue is dry, deep blue is wet.
The Napa Valley precipitation in December: frequently asked questions
How much rainfall does the Napa Valley, the United States of America receive in December?
December in Napa is marked by substantial rain, totaling an average of 120 mm (4.7 in). Rapid weather changes are common due to the frequent precipitation.
How many days does it rain in the Napa Valley, the United States of America in December?
Expect around 11 days rainy days in Napa during December.
Is December part of the rainy season in the Napa Valley, the United States of America?
No. December sits outside the typical rainy season in the Napa Valley, the United States of America, so you can expect drier conditions overall.
What is the wettest city in December in the Napa Valley, the United States of America?
In our database, Calistoga stands out as having an average rainfall level of 183 mm (7.2 in), making it the wettest location.
What is the driest city in December in the Napa Valley, the United States of America?
In our records, American Canyon stands out as the driest city in the Napa Valley, the United States of America for December, averaging just 101 mm (4 in).
Interested in more climate information?
We have much more information about the climate in the Napa Valley.
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